KR20030084863A - Electronic Commerce System and Method - Google Patents

Abstract

The present invention relates to an electronic commerce system and a method thereof.

The present invention comprises the steps of registering the bid provided by the buyer when the bid for the goods from the buyer terminal through the network; Determining a bid price by selecting a price written by the most bidders among the plurality of bids stored for each item and determining all bidders who have used the bid price as successful bidders; Providing a bidding opportunity to bidders not included as bidders among bidders for the item and including the bidders as bidders; Selecting a final successful bidder from the successful bidders; When the final bidder selects the item to be actually purchased and makes a payment and requests delivery, the final auctioner includes all the processes of closing the auction.

In the present invention, the buyer can purchase the article at a price significantly lower than the market price, and the seller can sell the item at a price, which can be beneficial to both the buyer and the seller, and in the case of the buyer, the purchase product can be selected. The more bidders, the more expensive goods can be purchased at the same bid.

Description

Electronic commerce system and its method {omitted}

Recently, due to the daily life of the Internet, electronic commerce that transcends regions and borders is being made. E-Commerce generally refers to business between bbt business to business, b to c business to customer, bct to customer and b to g business to government. In a homogeneous, integrated automated information system, it involves a series of activities such as marketing, procurement, service and transportation as well as commerce involving the flow of money using electronic media and electronic technologies and means.

Electronic commerce is a transaction between the buyer and the seller through a variety of methods.

; The most generalized transaction method in which a buyer selects a product and pays and purchases a product through various payment methods such as cash, credit card, and electronic money.

; Auction method where only a specific person who has a high number of buyers competitively participates in the purchase process and decides the buyer for the presented goods

The purchase price of a given item is set very low, and an unspecified number of buyers pay the bid fee and participate in a bid within a fixed period or a fixed number of bidders. The participation fee paid by bidders is a tender method that preserves the loss caused by the seller selling the goods cheaply.

; If the number of bidders for the items presented by the seller is more than a certain number, transactions are made between the buyer and the seller through various forms, such as a joint purchase method in which a sale is completed at a predetermined price.

In the case of auction and tender method, among the conventional e-commerce forms, a specific person who presents the highest price is selected as a successful bidder. In some cases, when a bid is competitively used, It may be determined to be too high than its actual value.

Even in the tender method, regardless of the number of bidders, bidders are bidders for a fixed period of time and bidders use the highest price or lowest price written by only one of them as the successful bidder and keep the bidding price as a successful bidder. If the total bid price paid out is too much than the actual value of the goods presented for sale, too much profit may be generated for the seller. Conversely, if there are few buyers participating in the auction during the bidding period, the seller may Selling at a cheaper price results in a loss.

In addition, even if the number of bidding capacity is set in advance, if the bidder is less than the number of seats, the auction period is extended or the auction is terminated, causing inconvenience to those who participated in the bidding at the beginning of the auction.

Therefore, the technical problem to be achieved by the present invention is to solve the problems of the conventional trading method (especially the auction method, tender method) and the buyer can buy the goods at a lower price and the seller is paid at a price to sell the goods In this way, we aim to activate electronic commerce by developing a stable business method that is beneficial for all trading partners.

Figure 1 shows the structure of an electronic commerce system according to an embodiment of the present invention.

FIG. 2 illustrates an initial display screen of an auction article and a detailed view of the article in an electronic commerce system according to an embodiment of the present invention.

3 illustrates the information and detailed information of the article to be purchased and the article to be auctioned in the case of being able to participate in the auction only by purchasing a specific article in the electronic strong trading system according to the embodiment of the present invention.

4 sequentially illustrates a process of making a bid in an electronic commerce system according to an embodiment of the present invention.

The electronic commerce system according to the characteristics of the present invention for solving the technical problem should be a certain qualification to participate in the auction as a bidding method with no bid entry fee as a commerce system connected to a plurality of buyer terminals through the network. In addition, the e-commerce system in which the number of bidders and bidders can purchase auction items is proportional to each other.

First, a method of giving a qualification (hereinafter referred to as 'points') to participate in a specific auction only to a person who purchases a specific article in an electronic commerce system according to an embodiment of the present invention.

Secondly, in the case of purchasing an item or using a service in the electronic commerce system according to an embodiment of the present invention, each item (service) is classified in such a way as to acquire a predetermined point and participate in an auction.

Hereinafter will be described in detail with reference to the accompanying drawings.

1. The structure of an electronic commerce system according to an embodiment of the present invention will be described with reference to FIG.

; Buyer's terminal is a communication device that can access and intervene with a brokerage system through a network. It refers to all equipment that can access the Internet, such as computers, wireless communication terminals, and TVs with Internet access.

; The intermediary system is an interface server for accessing and exchanging information through a network, a database server (DB) and user authentication tools that store various information, a bid registration tool, a successful bidding tool, a rebiding tool, a final winning bidding tool, and a payment. Include delivery tool.

; The interface server allows multiple buyer terminals to access the intermediary system through a computer, wireless communication terminal, or TV with Internet access.The user authentication tool, bid registration tool, successful bidding tool, re-bidding tool, final bidding tool, delivery / It converts the information provided by the payment tool, etc. according to the communication standard to provide to the buyer terminal, and receives the information provided through the buyer terminal to provide the tool to the tool.

The database server DB includes an article DB, an auction article DB, a bid DB, a re-bid bid DB, a successful bid DB, a member DB, a successful bidder DB.

The Goods DB stores information about all the goods that can be traded through an intermediary system.

The information on the item includes the name of the item, the item code number, the market price of the item, a detailed description of the item, the points paid when the item is purchased, the delivery information of the item (size, color, etc.), and payment information.

The auction item DB stores information on items to be sold at auction.

Information includes the item name, item code number, market price, detailed description of the item, the selected product and its description, the conditions for participating in the bidding (re-bidding), auction closing conditions, the highest bid, the lowest bid, the price discount, delivery information, payment information, etc. This includes.

The price discount is the amount of discount that discounts the sales price when the number of buyers who buy goods for a particular goods is not one but more than one. When you reach the number of buyers you have set up, you will sell at a discounted price at the time you apply.

; The bidding DB stores information on bidders bidding through the brokerage system.

Bidding information includes bids, lucky numbers, bidder personal information (resident number, contact information, email, etc.), number of bids, bidding time, and the like.

In the DB for successful bidders, the price of the most bidders among the bidders is the successful bidder and both bidders who use the successful bidder are called successful bidders. The bidding information of the successful bidder is stored, and the bidding information of the bidder included in the successful bidder is stored through re-bidding.

; The successful bidder DB stores the information of the successful bidders.

In order to purchase goods or search for specific information in the member DB, the purchaser must register as a member by providing the buyer's personal information (resident number, contact number, identification number (ID, password), etc.) Member's personal information, purchase information (items purchased, number of purchases, number of bid participations, bidding results, etc.), payment information (payment amount, payment amount, payment method, etc.), point information, etc. (Including point deposit and withdrawal, current point amount, available points, etc.) and shipping information (delivery address, delivery status, delivery date, etc.).

Based on the information stored in the database server, the processing server that processes the entire process from bidding to bidder selection and delivery consists of a user authentication tool, a bid registration tool, a bidding tool, a re-bidding tool, a final bidding tool, and a payment / delivery tool.

The user authentication tool handles the registration and authentication of users who access the intermediary system through the network.

The bid registration tool provides the product information and other information to the visitors (including members and non-members) and stores the bidding information of bidders (only those who have been certified) bidding for a specific item in the bidding DB.

; The successful bidding tool selects a successful bidder and a successful bidder based on the bidding information stored in the bidding DB and stores the successful bidder in the DB.

; Re-bidding tool selects bidders who are not included in the bidder based on the bidding information stored in the bidding DB and selects as a bidder and saves the bidder in the bidder DB.

The final successful bidding tool determines the final successful bidder among the successful bidders stored in the successful bidder DB.

The payment / delivery tool selects the item to be purchased by the final bidder, completes the payment for the item and requests delivery, and stores the processing result in the payment information stored in the member DB and processes the delivery.

An electronic commerce method according to an embodiment of the present invention will be described based on a system having such a structure.

2. The auction item information and detailed information of the goods will be described with reference to FIG.

The initial display screen (①) of the goods information stored in the auction item DB (D3) includes a picture of the item, a product name, a market price, a bid high price, and a bid low price.

; If you click the item picture or bid request button on the initial display screen (①), the detailed description screen (②) is shown through the buyer terminal.

Detailed description screen (②) shows the enlarged picture, product name, item code number, the highest bid price, the lowest bid price, auction period, the number of bidders available for bidding, the item options (size, color, etc.), remaining time, detailed description of the product ( Usage, product specifications, etc.)

It includes the selected product and its information, rebid period, presence or absence of rebid, point of bid.

The option includes one or more products.

The item information of the selected product includes the product picture, product name, market price, item options, and product details.

3. If the specific items must be purchased through Fig. 3 to participate in the bidding, the information and detailed information of the goods to be purchased and the items to be auctioned are destroyed.

4. The process of making a bid in the e-commerce system according to the embodiment of the present invention will be described sequentially through FIG.

① Access-When the purchaser enters the URL to access the intermediary system through the buyer's terminal, it is converted by HTTP (Hypertext Transfer Protocol) in the web browser, packetized, and then connected to the intermediary system through the network.

② Authentication-Next, the interface server (A) of the intermediary system sends a screen for membership authentication to the purchaser terminal (C). When the buyer enters personal information (ID, password) through the terminal (C), the user authentication tool (T1) ) Checks whether the information corresponding to the ID and password entered by the buyer is stored in the member database (D5) and performs member authentication. This step is optional and the buyer can access the brokerage system and retrieve the product information and other information stored in the item database D1 or the auction item DB D3 without going through the member authentication step. However, in the case of accessor without membership authentication, the search of information may be limited to a certain part, and activities for purchasing goods such as bid participation cannot be performed.

③ Check the item information-If the buyer selects the auction item (③a) and clicks the item picture or the bid application button to check more detailed information, the bid registration tool (T2) is selected with the detailed description of the auction item and the selected product and the selected product. The description is shown on the buyer's terminal. In the case of an auction where only the purchaser of the specific item ↓ can participate, information on the item to be purchased (③b) and information on the auction item (③c) are provided.

What is an optional product? The bidder determined as the final successful bidder may purchase by selecting among the items presented for sale (items for sale) or selected products registered on the detailed description screen of the items presented for sale. Refers to the goods presented in the Selected Goods column, which the final bidder may select and request for delivery after payment is completed according to the bidding result.

If the final bidder wishes to receive a product other than the selected product, it may be possible after consultation with the seller.

④ Purchase Request / Bid Request-If the buyer clicks the bid request (④a) button, bid request (④b) button, purchase request (④c) button after checking the goods information, the bid registration tool (T2) is the buyer's member In the case of a buyer who does not go through the verification step (②), the buyer is not able to participate in the bidding or cannot purchase unless the member is notified and guides the membership.

Certified members select auction items

: Bid application (④a) If you click the button, the bid registration tool checks the points that can participate in the buyer's bid and notifies the bid participation.If the members have enough points, fill out the bid application form to participate in the bid screen To the buyer's terminal. There must be certain points to participate in the bid. Points can be obtained by purchasing a specific article in the electronic commerce system according to an embodiment of the present invention or by a method disclosed by the seller before the auction starts.

If the bid application (④b) button is clicked, the bid registration tool checks whether the buyer has purchased a particular product and notifies the bidding participation. Provide the application screen and confirm delivery.

: If you click on the purchase request (④c) button, you can provide the payment screen to the buyer's terminal so that you can make a payment.If the payment is confirmed, you can check the buyer's points and, if enough, you can participate in the bidding of the auction item. Deliver and ship the goods. If you do not have enough points, you will be advised to charge the points.

⑤ Bidding Application Form / Bidding Information Confirmation – Bidder can enter several different bids in the bidding application and write one lucky number. When entering lucky numbers, you must click the Lucky Number Duplicate Check button to check whether the lucky number you wish to enter is already entered by another bidder. It must be generated. When the bidder clicks the bid form by filling in the bid application button, the bid registration tool (T2) provides a screen so that the buyer can check whether the bid information written in the bid application is correctly written. In addition, the bidder's unique bid number, bidding time, lucky number, number of bids, etc. will be disclosed to prevent fraudulent bidding, fairness and transparency.

After the buyer checks the bidding information and clicks the confirm bid button,

⑥ Point Withdrawal / Bid Registration-The Bid Registration Tool (T2) automatically withdraws points from each point owned by the buyer as needed for bid entry, and stores the buyer's bidding information in the bidding DB (D2). What is a point? Eligibility to participate in the bid is to return the profit by allowing the buyer to participate in the bid free of profit gained by the seller selling the goods. Has value.

In other words, a point of 1 won means "the seller returned the profit of 1 won except for (Item cost + minimum margin) by selling the goods to the buyer. You can participate. There are two types of points: cash points and save points.

The cash point is a qualification for bidding given by the seller when purchasing an item and cannot be used for any purpose other than bidding. Points needed for bidding are cash points. Save points are given to buyers who purchase goods, and are not eligible to participate in the auction, but are generally credited to pay some of the sales profit to cyber money. It can be used to purchase goods and not to participate in bidding.

⑦ Bid Closing-The Bid Registration Tool (T2) checks the number of bidding participants or bid deadlines for each item and automatically closes the bid if the bid deadline is met. Send to buyer.

(8) Selection of successful bidder and bidder-The successful bidding tool (T3) selects the successful bidder and bidder based on the bidding information stored in the bidding DB (D2).

In the selection method, the bidder on the bid application written by the most bidders is the successful bidder and all bidders who have used the bidder are called bidders.

For example, when the bidding closes, 12 bidders spend 1000 won, 15 bids 2000 won, 25 bids 3000 won, and 27 bids 3700 won. The bid of $ 3700 will be the winning bidder, and all 27 people who won $ 3700 will be the bidders.

(9) Result notification / re-bid participation confirmation-After the successful bidding tool (T3), the successful bidder will be notified of the auction result through the buyer's terminal or e-mail and stored in the successful bidder DB (D6).

In addition, bidders who are not included in the bidder (50 in the example above) are checked to see if they are willing to participate in the re-bidding. Whether or not to re-bid a proposed sale item (item for auction) is optional, and each item stored in the goods DB includes information on the re-bidding.

What is rebidding? The bidders who are not included in the successful bidder pay the points necessary for re-bid participation and bid again according to the successful bidder determined in the successful bidding tool (T3) to be included in the successful bidder. Here, even in the case of re-bidding, only the first bid on the bid application written at the time of initial bidding is modified to the winning bid price, but the remaining bids and lucky numbers cannot be modified.

Points required to participate in re-bidding usually pay more than the initial bid, in order to meet equity with the bidders selected as the bidders in the initial bid. The proper amount of points required for re-bidding is likely to be about three times the initial bid.

Because as the number of successful bidders increases, the probability of being selected as a successful bidder is lowered. If the successful bidder is paid, the value of the items that can be purchased at the successful bidder price is increased.

Explain the correlation between the number of bidders and the items to be purchased.

The bidding rights (points) can be acquired only by a buyer who purchases the goods or uses the service in the electronic commerce system according to the embodiment of the present invention. By returning to the buyer, the buyer collects the profits they receive, and selects a successful bidder through the auction method and gives all the profits to the successful bidder. Also, the successful bidder selects and purchases the purchased items within the range of profits collected by the participants.

After all, the more points (that is, the larger the number of bidders), the more the seller sells the goods and the more profits are generated, so the amount that is returned to the buyer is also greater. Here, the present invention is different from the prize method (the method of paying a lottery ticket, a lottery ticket, etc. to a customer who purchases an item or uses a service, and pays a predetermined prize prize to the winner through a lottery). Even if there is a small amount of winnings, there may be a case where the winnings are determined regardless of the number of buyers who purchase goods or use the service. Also, in the case of lottery, if the winnings are fixed or not, there may be several winners (especially the first winners), so the number of participants is not necessarily proportional to the number of participants. However, in the case of the present invention, one successful bidder is necessarily generated, and the value of the items that the successful bidder can purchase becomes larger as the number of bidders increases. Therefore, the seller spends only as much as he profits from selling the goods, and the buyer can also purchase expensive goods at a price much lower than the market price.

⑩Certification- Re-bidding tool (T4) confirms whether the bidder is the first member of the bidder after the bidder clicks on the bid application button, and then confirms and notifies whether the bidder participated in the first bid among the members. Re-bidding is only available to bidders who participated in the initial bid and were not included in the bidder.

확인 Point Check / Re-Bidding- After the bidder clicks the bid application button on the information of the first bidding item (auction item) stored in the goods DB (D1), the re-bidding tool (T4) After confirming the points that can participate, it will notify whether or not they can participate. If points are not enough, you will be advised to participate in re-bidding after earning points and guide you to earn points.

If you have enough points, you can fill out a re-bid application form and provide a screen for re-bid registration.

⑫ Bidding Information Confirmation- The re-bidding tool (T4) provides a screen to the purchaser terminal to check whether the re-bidding application prepared by the bidder is correctly prepared. When the bidder checks the bidding information and clicks the bid registration confirmation button

Point Withdrawal / Bid Registration-Automatically withdraw the points required for re-bidding from the bidder's account and store them in the bidder's DB.

⑭ Re-Bid Closing-On the other hand, when each item stored in the auction item DB reaches the re-bidding deadline, the re-bid is automatically closed, and after the deadline, a bidding message is sent to the bidder applying for re-bidding through the buyer's terminal.

Final bidder selection-The final successful bidding tool (T5) is equal to the last three digits of the winning bidders * (multiply) successful bidder = 000000 among the successful bidders stored in the successful bidder DB (D6). The winner of the bidder who uses the nearest lucky number as the lucky number in the number larger than the three digits of the result number is determined as the winner. (The number of digits of the lucky number is optional and can be adjusted to four or five digits as needed.)

For example, if the successful bid price is 2756 won * the number of successful bidders is 178 = 490568, the successful bidder using the lucky number 568 becomes the final successful bidder. If there are no bidders using 568, the winner is the one who uses the most approximate value (569) among the numbers greater than 568.

Auction Results Notification-The final auction tool (T5) notifies the final bidder and the remaining bidders through the buyer's terminal, e-mail, etc., and among the selected auction items presented to the final bidder and the detailed description of the auction items presented Select the item to be purchased and ask to pay for the item.

Purchase item selection / payment request-The final bidder selects the item to purchase from the presented auction items or the selected items registered on the detailed description screen of the auction item, and pays the price (= successful bid price) and requests delivery. Payment methods include bank transfer, credit card payment, and electronic money. In this case, if the bidder's purchase price is higher than the purchase price that the bidder can purchase as a result of the auction, the bidder may purchase by paying an additional amount of the goods. If the value of the item chosen to be purchased is less than the value of the item that can be purchased, the difference is deposited into the save point to the buyer's account.

For example, if the total bid price + bid point total is 10,000 won and the price of the selected item is 11,000 won, the successful bidder can purchase the selected item by paying an additional 1,000 won. In the above example, if the price of the item selected for purchase is 9000 won, the difference is converted into points by 1000 won, and 1000 points are accumulated in the winner's account. A value of 1 point is equivalent to 1 won.

Payment / Delivery-The seller closes the auction by delivering the goods requested by the final bidder for delivery based on the payment information stored in the successful bid DB (D4). If the final winning bidder is notified three or more times through the buyer's terminal, e-mail, or wired / wireless telephone, respectively, the purchase auction is not made within one year (365 days) after the final bidder's decision. It shall be regarded as 'the total amount of bid points', and shall be disposed of in a normal manner and donated to public interest organizations, and the details shall be disclosed to all members stored in the member DB (D5) for at least 7 days.

As described above, the present invention allows buyers to purchase goods at a much lower price than free or market price when the bidder participates in the bidding, and the more purchasers can purchase more expensive goods at the same price. . In addition, in the case of sellers, bidding is not only effective in attracting customers by returning profits to buyers in the range of profits from selling goods, but also by selectively presenting the goods for sale (auction items) according to the number of bidders participating in the auction. Regardless of the number of participants and the small number of participants, it is possible to reliably get the price and sell the goods.

In addition, regardless of the number of bidders, the auction may not be delayed or bidded by always generating a successful bidder, thereby improving the reliability and electronic commerce of the present invention.

Claims (3)

In an e-commerce system connected to multiple buyers through a network ; Bid Highest Price, Lowest Bid, Item Code Number, Market Price, Shipping Information, Auction Period, Remaining Time, Item Options (Size, Color, etc.), Selected Items and Their Information, Number of Bids, Photo of Goods, Items Auction item database that stores detailed descriptions (item specifications, how to use), bidding (re-bidding) entry conditions, re-bidding, price discounts, and auction closing conditions. The total points earned by bidders when a buyer purchases an item or uses a service in a free e-commerce system according to an embodiment of the present invention and gives a qualification (points) to participate in the auction free of charge, and the buyer enters the auction and becomes a successful bidder. Bid registration tool that allows buyers to purchase goods for an amount ; Buyers enter multiple bids (more than one) and lucky numbers in the bid application to participate in the bidding, and do not duplicate the numbers with other participants by checking duplicate entries in advance when entering lucky numbers. A bid registration tool that ensures that only one successful bidder must be successful, and that bidding information is disclosed and bidding is transparent and fair by preventing bidding. The bidding information to be disclosed includes the bidder's bid number, bidding time (up to seconds), lucky number, and the like. You can use multiple bids in one bid, but lucky numbers only once. Lucky numbers include not only Arabic numerals, but also other methods used to distinguish them from other participants, such as letters, symbols, and symbols. ; A bidding tool that selects a bid on the bid application written by the most bidder among the bidders based on the bid information stored in the bidding database and selects all bidders who use the bidder as bidders. ; If the bidder participates in the bidding of a specific article in the bidding tool and is not included in the bidder, the bidder determined in the bidding tool is disclosed and participates in the re-bidding as the bidder. Eligibility to participate in re-bidding may be limited. ; Auctions will be closed automatically when the auction closing conditions (number of bidders or auction period) for each item stored in the item database are automatically closed and the bidder is not extended or invalidated regardless of the number of bidders or the total amount of points. Bidding tool and re-bidding tool to determine. ; Number of successful bidders (multiplied) = Number of successful bidders = Number of winning bidders Final successful bid tool. The number of lucky digits can be used optionally, and the result number can also be used for addition, subtraction, and division other than multiplication. According to the auction result in the auction result, the value of the item (auction item) that the successful bidder can purchase for the same amount (auction price) or the kind of the item varies in proportion to the number of bidders participating in the auction or the amount of points paid by the bidders. The e-commerce system includes a payment / delivery tool that allows a buyer to select and purchase an item to be purchased from auction items or selected products. E-commerce system in the e-commerce system according to an embodiment of the present invention can purchase the auction target item (item for sale) at a price much lower than the free or market price without paying a bid entry fee. What is the bidding fee? If you pay to participate in the bidding, you pay money to participate in the bidding, purchase a bid coupon or pay the money directly in the bid, or buy the goods and receive a portion of the purchase amount as a reserve and pay the reserve. A bidder who pays a bid or purchases a bid coupon with a reserve is considered to have paid the bid. An e-commerce system and an e-commerce system capable of immediate delivery, which allow the buyer to purchase a specific article in the bid registration tool to participate in the auction. In other words : A sale item A 1000, auction item B : Points needed for bidding are less than or equal to (a + b + c) The selling price of item A is lowered as the number of buyers (the number of items sold) increases (selling at a predetermined price. If only the buyer who purchased the item A can participate in the bidding of the auction item B, in general, in the case of the joint purchase, the buyer pays for the goods at the price at which the buyer applied for a purchase and then purchases the product and sells it. The final purchase price is determined by the cumulative number of items sold by the deadline, and buyers pay the final purchase price to purchase the item and receive the delivery. However, in the e-commerce system according to the present invention, the buyer pays the price of the goods at the price point at which the buyer applied for a purchase, and the seller immediately delivers the goods after confirming the payment. The logic background is described using the above example as an example: * ("-" is subtracted, "+" is plus sign) If you sell 10 items, the selling price is 10,000 won If 300 items are sold, the selling price is (10000-a) If 700 items were sold, the selling price (10000-a-b) = 8,000 won If 1000 items are sold, the selling price is predetermined as (10000-a-b-c) = 7000 The cash points that buyers can earn from sellers are A + b + c for buyers between 1-10 items B + c for buyers (I) between 11-300 items C for buyer (c) between 301-700 items If you are a buyer between 701 and 1000 items, you will receive ↓ 0 (zero) points. therefore : Buyer (A) can get a point a + b + c and participate in free bidding by purchasing for 10,000 won : Buyer (B) must earn points b + c and pay an additional point a to participate in bidding. : Buyer (C) must earn Point c and pay additional points a + b to participate in bidding. In case of Buyer (D), you must get 0 points and pay additional points a + b + c to participate in the bidding. Eventually, the purchase price of each buyer is different depending on the cumulative number of items sold, but as a result, they are under the same purchase conditions. Therefore, the buyer purchases at the price of the initial purchase (for example, 10000 won), pays for the goods and immediately delivers them. Even if it is received, the goods will be purchased under the same conditions as the buyer who purchased for 7,000 won.